JB/106/067/003

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2o. Indirect, on the Hydrometer principle 106 f.67 vers0 (b)
Rising in proportion as the fluid in which it is
immersed contracts & sinking as it expands.
The expansion of the glass or other materials
must be deducted as it will counteract the force
with which the motions will with which these motions will be be performed.

Scale marked in the Stem.

They will be less sensible and accurate than common
themometers; but vastly less expensive.

Qu - fluid? Distilled water. -oil-solution of salt?
Mercury.

Qu. would it be better to add weights to a small cap
at the top?

{Sketched drawing of contrivance}

3. Saturation - Quantity of salts dissolved by water, known by sp.c gravity
as Sulphate of soda, &c.

Quantity of water dissoleved by air. Vide Dr Hutton's experimets.

Proportional quantities of acid & alkali in Carbonate of Ammonia
Vid. Davy's Exper.ts

4. Decomposition.

N.B. Thermometers placed at top of liq.ds are cooling at bottom of those heating

for average temperature at middle.

Means of inspecting the thermometer by a pane of glass opposite
to where it is placed, & a door or by thermometers projecting.

Qu. Means of transferring the expansion:
a horizontal tube

{Sketched diagram of design showing location of water and mercury}

Identifier: | JB/106/067/003"JB/" can not be assigned to a declared number type with value 106.
Date_1		Marginal Summary Numbering
Box	106	Main Headings	frigidarium
Folio number	067	Info in main headings field
Image	003	Titles	preservation of uniformity & steadiness of temperature
Category	copy/fair copy sheet	Number of Pages	4
Recto/Verso	recto	Page Numbering	f4 / / /
Penner	fr4	Watermarks	pot 1796
Marginals		Paper Producer	fc6
Corrections		Paper Produced in Year	1796
Notes public	includes drawings	ID Number	34655
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